Midwest Street Division Classes are for beginner and entry level competitors only. Manufactures, retailers and professionals are discouraged from participating in these classes. This includes but not limited to: Anyone that has competed at any World Finals, anyone that is a current member of another sound off organization, someone that has higher skills or knowledge than others in their class. Moving someone out of these classes is at the sole direction of the event promoter or judge. Midwest Street Division rules may vary from event to event. General rules are outlined in Section 7 of this rule book.

Midwest Street Division
( no points ) These are typically offered at most Midwestspl Events. In these classes, music must be played.

MSD 1  Up to 1-12, 2-10s or 3-8s ( peak score )

MSD 2  Up to 1-15, 2-12s, 3-10s or 4-8s ( peak score )

MSD 3  Up to 1-18, 2-15's, 4-12's ( peak score )

MSD 4  Unlimited ( peak score )

National Level - These classes are for the serious competitor that wants to compete against others from their region. These classes are typically more advanced and have a certain set of rules and guidelines to go by. These classes are eligible to attend finals and have a chance to win some prize money at the end of the year.

Basic Division
- Designed for your average retailer level install. For those with a simple yet competitive system that would want to compete on a national level.

S.L.A.M. - Sound, Looks & Modifications. A car show type of format that allows competitors to acquire points for everything they've done to their vehicle. Unofficial class. No points. Not at finals. Not at every event. S.L.A.M. Score Sheet.

Power SPL - Designed for Children's toys ( Power Wheels ), a fun format for the kids to participate in with their parents. Unofficial class. No Points.

Top Dog - Everyone plays the same! We've developed the perfect 1 minute song to test a true musical system. Each competitors plays the exact same song ( track 19 on the official Midwestspl CD ). This song covers frequencies between 30 and 50 Hz randomly. Who ever plays the song the loudest, wins!